Theoretical and experimental study of Fe/Cr nanometric quasiperiodic multilayers |
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Authors: | T Freire MA Correa C Chesman AB Oliveira |
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Institution: | a Departamento de Física, Universidade Federal do Rio Grande do Norte, Natal-RN 59072-970, Brazilb Escola de Ciências e Tecnologia, Universidade Federal do Rio Grande do Norte, Natal-RN 59072-970, Brazil |
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Abstract: | An experimental and theoretical study of magnetization curves of Fe/Cr nanometric magnetic films grown with the structure of the quasiperiodic Fibonacci sequence is presented. Fe ferromagnetic films with interfilm exchange coupling provided by intervening Cr non-ferromagnetic layers were grown on MgO (100) by dc magnetron sputtering at 300 °C. The magnetization curves were investigated using the magneto-optical Kerr effect with the external field applied along the easy axis. The theoretical approach for this system is based on a realistic phenomenological model that includes the following contributions to free magnetic energy: Zeeman, cubic magneto-crystalline anisotropy, as well as bilinear and biquadratic exchange energies. Our numerical results are in very good agreement with the experimental data. |
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Keywords: | A Magnetic films C Thin film structures C Quasiperiodic D Magnetization |
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